Machine for sharpening pencils



(No Medel.) A

W. RUNDQIST 85 L. JACK'MAN. MAGHINB FOR SEARPENING PBNGILS.

10.438,569. .Petented oet. 14,1890.

Humm l f lllll UNITEDl STATES PATENT OFFICE.-

VVILLIAM RUNDQUIST AND LEMUEL N. JACKMAN, OF ELGIN, ILLINOIS.

MACHINE, FOR SHARPENING PENCILS.

SPECIFICATION forming part of Letters Patent No. 438,569, dated October14, 1890.

Application tiled July 17,1890. Serial No. 359,026. (No model.)

To all whom it may concern:

Be it known that we, WILLIAM RUNDQUIST and LEMUEL N. JACKMAN, citizensof the United States, residing at Elgin, in the county of Kane and Stateof Illinois, have invented certain new and useful Improvements inMachines for Sharpening Pencils; and we do hereby declare the followingto be a full, clear, and exact description of the invention, such aswill enable others skilled in the art to which it appertains to make anduse the same.

Our invention relates to machines for sharpening pencils; and it has forits obj ect the provision of means for pointing a pencil uniformlywithout requiring manipulation or adjustment of the work by the operatorafter it has been placed in the machine.

Vith this and other ends in View our invention consists in thecombination of a rotary work-holding mandreland a rotatory grinding diskor plate arranged in juxtaposition to the mandrel as to operate on thework therein in such manner as to impart a conical or tapered point orend to such Work. The rotatory disk is arranged edgewise with relationto the mandrel and at an angle or obliquely to the longitudinal axis ofsaid mandrel, so that the surface or face of the disk .or plate is setto grind the pencil, and as the mandrel rotates it constantly presentsnew surfaces for the disk or plate to act upon, thus uniformly grindingor removing the work or pencil and imparting the desired point thereto.

Our invention further consists in the cornbination of a rotatorygrinding-disk, a mandrel arranged to rotate in the reverse direction tothe rotation of the disk, a drum or pulley Vgeared to both the disk andmandrel to cause their normal positions, and a hand-operated device formanually rotating the drum or pul- Vliar combination of devices andnovel construction and arrangement of parts, as will be ley and theseveral connected parts.

Our invention further consists in the pecuhereinafter more fullydescribed and claimed.

To enable others to understand our invention, we will now proceed to adetailed description thereof in the accompanying drawings, in which-hFigure I is a plan view of a machine for sharpening pencils embodyingour invention, with the top or cover of the casing removed. Fig. II is avertical longitudinal sectional view on the plane indicated by the linea: o@ of Fig. I. Fig. III is a vertical transverse sectional view on theplane indicated by the line y y of Fig. I. Y

Referring to the drawings, in which like numerals of reference denotecorresponding parts in all the figures, 1 designates the rotatorygrinding-disk, and 2 the rotary mandrel adapted to hold and carry thework or pencil. The disk or plate is arranged edgewise in relation tothe end of the mandrel, and it is situated obliquely or at an angle tothe axis of the mandrel, so that the work carried by the mandrel extendsover the face of the disk in such relation thereto that the work orpencil Will be ground when the disk or mandrel is rotated. As in thepreferred embodiment, herein illustrated, the mandrel is arranged in ahorizontal position with the edge of the inclined disk very close to theend of the mandrei; but this is not essential, as the mandrel may bearranged vertically, and the disk may be situated farther away from theend of said mandrel.

The mandrel 2 is journaled in a stationary bearing 3, which is suitablyfixed to the shell or jacket 4, which incloses the several operativeparts of the machine, and which is provided with removable tight-fittingbottom 4 and cover 4.".

The mandrel 2 protrudes beyond the ends of the iiXed bearing 3, and saidmandrel is made tubular or hollow, as shown in Fig. III, to receive thepencil or work. We prefer to employ this hollow or tubular mandrel andyto construct the saine with spring or elastic fingers 5 5' at the endsthereof, so as to grasp and hold the pencil or Work by frictionalcontact between said mandrel and the work; but it is evident that aWork-holder can be provided for the mandrel in order to hold the pencilto the mandrel, so that it (the pencil or work) will rotate with saidmandrel. 'The mandrel is further provided at its inner end with agrooved belt-pulley 6, arranged Within IOO the case orshell 4, and overthis pulley passes a belt or cord 7, which runs to and around a drum orpulley 8. This drum or pulley S is arranged within the shell Liat theend thereof, with its axis parallel with the rotary mandrel, and saiddrum is journaled in suitable bearings within the shell or case 4.

The inclined rotatory disk 1 is provided with a roughened surface formedby a sheet or layer of sand-paper or equivalent material, which layer isremovably clamped to the disk by a clamp or ring, so that the sheet canbe removed when worn and replaced with ease. The said disk is furtherprovided on the opposite side to the grinding-surface thereof with apulley 9, which is rigid with said disk, and around this pulley of thedisk is coiled a pulling-rope 10, one end of which passes to and iscoiled around the drum a suitable number of times, and is attached tosaid drum, while the other end of the pulling rope or cord passesthrough an aperture 1l in the case or shellfi and has attached to it aknob or handpiece 12, for conveniently manipulating the machine. Therotary drum is thus belted or geared to the disk and mandrel to causesaid parts (the mandrel and disk) to rotate simultaneously with the diskand in opposite directions to each other, thedruln receiving motion fromthe disk when the cord 10 is pulled; but it is evident that power can beapplied directly to the drum and that the disk and mandrel can be gearedto said drum to be rotated simultaneously in opposite directions therebywithout departing from the spirit of our invention.

The drum or pulley is held under tension and returned to normalposition, so that the pulling-rope is coiled thereon and drawn backwithin the case by means of a spring 5', which is preferably coiledaround said drum and attached at its ends to the drum and the case or toany other suitable fixture within the case. Ve also provide a presser orregulator bar 13, which is arranged above the grindingdisk and at oneside of the mandrel transversely to the axis of the same, so that saidbar can be manipulated to depress or hold the work against the disk orto limit the inward movementor adjustment of the Work in the mandrel.This bar is preferably made of spring metalso that it is free fromcontact with the disk, and one end of the bar is detachably attached tothe case or shell 4 by means of a pin -and-socket connection 11i, whilethe opposite end of the bar works in a slot 15 cut in the opposite wallof the case.V The presser-bar 13 has a contact piece or surface adaptedto impinge or bear against the pencil, and the free end of the bar,which protrudes beyond the case or shell so that the bar can beconveniently manipulated, has a finger-piece 17 thereon.

The operation of our invention is simple and may be briefly described asfollows: rPhe work or pencil is thrust endwise into the hol-y low ortubular mandrel until the end strikes the contact-piece of thepresser-bar, and the work is held or clasped in the mandrel so as torotate or turn therewith. The pulling-cord is now drawn out to rotatethe disk, drum, and mandrel, and the roughened surface of the diskgrinds the pencil down to a conical or tapered point. It is onlynecessary to eX- ert force todraw the pulling-cord outward, as thecoiled spring reverses the drum, the disk, and the mandrel, which can beaccomplished by one hand, while the other can be used to shove thepencil into the machine or to de'- press the bar to hold the pencilagainst the disk or to limit the inward adjustment of the pencil. Afterthe pencil has been adjusted the bar can be released and one hand usedto hold the machine in place, while the other hand operates thepull-cord.

Although we have shown and described our invention as especially adaptedfor sharpening pencils or pointing them, yet we do not strictly confineourselves to this particular use of the machine, as we have found thatit can be advantageously used for sharpening or grinding cutlery, andfor other purposes.

The roughened sheet of sand -paper is clamped in any suitable manner tothe rotatory disk-as, for instance, by a ring or bandso that thesand-paper can be readily removed when worn and easily replaced byanother sheet. j

Changes in the form and proportion of parts and details of constructioncan be made without departing from the spirit or sacrificing theadvantages of our invention, 'and we therefore hold ourselves at libertyto make such alterations and modifications as fairly fall Within thescope of our invention.

Having thus fully described ourinvention, what we claim as new, anddesire to secure by Letters Patent, is l l. The combination of apositively-rotated mandrel adapted to carry the pencil or equivalentwork, and a grinding-disk arranged edge- Wise in relation to the mandreland inclined obliquely to the longitudinal axis thereof, and provided onits lateral face with an abrasive covering, whereby the work carried bythe mandrel is rotated or turned simultaneously with the rotations ofthe grinding-disk, sub stantially as described.

2, The combination of a rotary mandrel, a rotatory grinding-diskarranged edgewise with relation to the mandrel and inclined obliquely tothe longitudinal axis thereof, vand means for rotating the disk andmandrel in opposite directions, substantially as described.

3. The combination of a rotary tubular mandrel, a rotatory grinding-diskarranged edge wise in relation to the mandrel and oblique to the axis ofthe same, and the drum or pulley geared to said mandrel and thegrindingdisk to rotate the same in opposite directions simultaneously,substantially as described.

4. The combination of a rotary mandrel, the rotatory grinding-diskarranged obliquely to the axis of said mandrel, means for im- IOO IIO

parting movement to said disk and the mandrel, and a bar arranged abovethe disk and at one end of the mandrel, for the purpose described,substantially as set forth.

5. The combination of a rotary tubular mandrel having means for claspingthe work thereto, a grinding-disk arranged obliquely to the axis of themandrel, a spring-controlled drum geared to the mandrel, and apullingrope coiled around the disk'and the drum to actuate the same,substantially as described.

G. The combination of a rotary tubular mandrel having theclasping-ngers, a rotatory grinding-disk arranged obliquely to themandrel and having the pulley, the spring-controlled drum geared to themandrel, the pulling-rope coiled around the pulley of the disk and thedrum, and the spring-bar arranged above the disk at one end'of themandrel and protruding beyond the machine through a slot therein,substantially as described.

7. The combination of a rotary mandrel,

the rotatory grinding-disk arranged edgewisel device, and means forimparting movement to the disk and mandrel to rotate the same inopposite directions simultaneously, substantially as described.

In testimony whereof We affix our signatures in presence of twoWitnesses.

WILLIAM RUNDQUIST. LEMUEL N. JAcKMAN.

Witnesses:

W. H. HOAR, ALFRED LAVORE.

